Cation termination at ion-polished and chemically etched (001)YBa sub 2 Cu sub 3 O sub 7 crystal surfaces: An ion channeling study

Journal Article · Mon Feb 18 00:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.104515· OSTI ID:5690768

Fiory, A T; Hebard, A F; Eick, R H; Schneemeyer, L F; Waszczak, J V; Gossmann, H ^[1]

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1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (USA)

Local cation order approaching ideal bulk termination was found for cleaned (001) surfaces of YBa{sub 2}Cu{sub 3}O{sub 7} crystals by ion-channeling surface-peak analysis. Surfaces etched in dilute CH{sub 3}OH:Br{sub 2} and ultrasonically agitated in CH{sub 3}OH to dislodge the Br{sub 2} appear terminated preferentially by the Cu-O double-plane'' sequence, containing less than 1/2-cation monolayer of surface disorder. Planar polishing with ion beams incident at a glancing angle on a rotating crystal leaves residual disorder as low as {similar to}8 A, damage which is readily removed by a light chemical etch.

• OSTI ID: 5690768
• Journal Information: Applied Physics Letters; (United States), Vol. 58:7; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CHEMICAL POLISHING
ION CHANNELING
COPPER OXIDES
YTTRIUM OXIDES
COMPUTER CALCULATIONS
ETCHING
HIGH-TC SUPERCONDUCTORS
SUPERCONDUCTING FILMS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHANNELING
COPPER COMPOUNDS
FILMS
OXIDES
OXYGEN COMPOUNDS
POLISHING
SUPERCONDUCTORS
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360206 - Ceramics
Cermets
& Refractories- Radiation Effects